ISO 12103-1, A4 COARSE TEST DUST is used in many applications such as air filter testing, fuel filter testing, abrasion testing, etc. Click on the following link to see a list of standards and specifications that use ISO 12103-1, A4 Coarse Test Dust. Filtration Standards & Specifications. Click on the

ISO 12103-1, A3 MEDIUM TEST DUST is used in many applications such as filter efficiency, fuel filter testing, hydraulic filter testing, etc. Click on the following link to see a list of standards and specifications that use ISO 12103-1, A3 Medium Test Dust. Filtration Standards & Specifications. Click on the following

ISO 12103-1, A2 FINE TEST DUST is used in many applications such as air filter performance testing, oil filter testing and hydraulic filter testing, etc. Click on the following link to see a list of standards and specifications that use ISO 12103-1, A2 Fine Test Dust. Filtration Standards & Specifications. Click

ISO 12103-1, A1 ULTRAFINE TEST DUST is used in many applications such as air filter performance testing, oil filter testing and hydraulic filter testing, etc. Click on the following link to see a list of standards and specifications that use ISO 12103-1, A1 Ultrafine Test Dust. Filtration Standards & Specifications.